adding background image to div code example

Example 1: div background image

#avatar {
    /* This image is 687 wide by 1024 tall, similar to your aspect ratio */
    background-image: url('http://i.stack.imgur.com/Dj7eP.jpg');
    
    /* make a square container */
    width: 150px;
    height: 150px;

    /* fill the container, preserving aspect ratio, and cropping to fit */
    background-size: cover;

    /* center the image vertically and horizontally */
    background-position: top center;

    /* round the edges to a circle with border radius 1/2 container size */
    border-radius: 50%;
}

Example 2: background image

div {
  background-color: #ffffff;
  background-image: url("img_tree.png");
  background-repeat: no-repeat;
  background-attachment: scroll|fixed|local|initial|inherit;
  background-position: right top  |  x% y%  |  xpos ypos;
  background-clip: border-box|padding-box|content-box|initial|inherit;
  background-size: auto|length|cover|contain|initial|inherit;
}
//shorthand:
div {
  background: #ffffff url("img_tree.png") no-repeat right top;
}

Example 3: make image background of div

background-image: url("photographer.jpg");